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I've been running my mods on 1.5.2 perfectly for the past month but then I randomly get this crash report when starting the game. I can start 1.6.2 good but 1.5.2 crashes after the mojang logo. I use, optifine D3 Ultra, glsl shaders, dragon mounts, flans mod (mw3 guns, nerf guns, manus modern warfare, manus ww2), turbo model thingy, mo creatures, fossil and archeology revival, custom mob spawner, and gui api (if that counts).
Crash Report:

---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 7/27/13 1:46 PM
Description: Failed to start game

java.lang.NullPointerException
at drzhark.mocreatures.MoCProxy.initializeEntities(MoCProxy.java:875)
at drzhark.mocreatures.MoCProxy.ConfigPostInit(MoCProxy.java:644)
at drzhark.mocreatures.client.MoCClientProxy.ConfigPostInit(MoCClientProxy.java:735)
at drzhark.mocreatures.MoCreatures.postInit(MoCreatures.java:480)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:494)
at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:192)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:172)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:103)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:696)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:213)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:448)
at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:733)
at java.lang.Thread.run(Thread.java:680)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Mac OS X (x86_64) version 10.8.4
Java Version: 1.6.0_51, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 410108344 bytes (391 MB) / 534708224 bytes (509 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v7.51 FML v5.2.23.737 Minecraft Forge 7.8.1.737 9 mods loaded, 9 mods active
mcp{7.51} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
FML{5.2.23.737} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
Forge{7.8.1.737} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
GuiAPI{0.15.6} [GuiAPI] (GuiAPI-0.15.6-1.5.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
CustomSpawner{2.2.2} [DrZhark's CustomSpawner] (CustomMobSpawner 2.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
MoCreatures{5.2.3} [DrZhark's Mo'Creatures Mod] (DrZharks MoCreatures Mod v5.2.3.zip) Unloaded->Constructed->Pre-initialized->Initialized->Errored
DragonMounts{0.99.2} [Dragon Mounts Forge (WIP)] (Dragon-Mounts-Mod-1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
FlansMod{2.3.1} [Flan's Mod] (Flans Mod 2.3.1 for Minecraft 1.5.2 Universal.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
fossil{1.5.2 Build 5.1} [Fossil/Archeology] (Fossil-Archaeology-5.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized
LWJGL: 2.4.2
OpenGL: NVIDIA GeForce GT 650M OpenGL Engine GL version 2.1 NVIDIA-8.12.47 310.40.00.05f01, NVIDIA Corporation
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Texture Pack: Moartex_1.5.zip
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null